Hoisting frame



Aug. 23, 1938. D. LEVOW HOISTING FRAME Filed Jan. 29, 1957 Wan INVENTOR. :Ibavzd .Gev-ow' 3% ATTORNEY.

Patented Aug. 23, 1938 I a t UNITEDfSTATES 'OF'FICE 2,127l iIIjj' HOISTINGF FRAM i David Le 'ow, NewfYork, N, Y.

Application January 29, 1 9 3 7-, S erial No. 122,923

t '4 Claims. ei;1,j29i ;ei I I This invention relates to improvements in hoistsurfaces of arms 8 and the ring C may be brought ing frames, being particularly directed to a 001- into firm interlocking relationship at the channel lapsible unit formed of internesting elements formations.

capable, upon assembly, to provide a rigid and A handle D is mounted in eyes I 9 at the free firmly reenforced construction. extremities of arms I. 5

Specifically, it is an object of this invention to Referring to Fi s 1 and the operations f r provide for hoisting frames incorporating spaced pa d d C p g the hoisting frame are carrier bars and a reenforcing band cooperating as l w to expand a ion fr m the with each of said carrier bars, the respective bars apsed position shown i Figure 2 to at o 10 and reenforcing element being separable with Figure pp b s A and B are displaced I0 respect to one another and capable upon collapse gularly w r p to o e another about pivot of the hoisting frame of internesting assembly Thereafter, g C is gularly di ed about in a mi im m of space, pivot H! to a position substantially but not quite These and other advantages, capabilities and horizontal to the bases Of the support bars. Bars features of the inv ntion will a r fr m th 8 are at such time in position so that the channel 15 subjoined detailed description of one specific emformations l l therein are adjacent the channel bodiment thereof illustrated in the accompanyi formations l 5 of the ring C. The arms 8 are then drawin i hi h flexed inwardly, as shown in Figure 3, and allowed Figure 1 is a perspective view of the hoisting to Spring out to provide interlocking etween the frame. surfaces defining the channels of the arms and 20 Figure 2 is a front elevation of the hoisting the r fram a c01lap ed To collapse the construction shown in Figure 1 Figure 3 i a end i ti partly in section to that of Figure 2, the reverse process is carried t k along li 3 3 of Figure 1, out arms 8 of support bar B are flexed inwardly 5 Figure 4 is an end elevation in section taken (see Figure 3) until the surfaces defining the along line 4 4 of Figure 1 channels are separated, support bars A and B dis- Referring to the reference characters in the Placed ab ut the D ot 9 to P e sm With the drawing, th hoisting fram i comprised of arms of support bar B disposed exteriorly of arms plurality of U-shaped support members A and B 1 of pp and ring C displaced about n reenfurcing ring 3, The base 5 of Support the horizontal axis to vertical position between 30 member A is narrower in width than base 6 of arms? of pp a d in line therewith.

support member B, to .permit nesting, while the It is Obvious that Various Changes a d modiarms 1 of the member are longer than the cor.. fications may be made to the details of construcresponding arms 8 of member 13. tion Without departing from the general spirit of Support members A and B are apertured the invention as set forth in the appended claims. 5

trally of their bases 5 and 6 and a rivet 9 passed I claim! therethrough so as to mount A within B for piv- A collapsible hoisting frame Comprising a otal displacement angularly of either of the same plurality of support members pable of nesting about the rivet as a vertical axis. Adjacent the one in the other, Said pp embers being piv- 40 end of arms 1 of support bar A th is mounted oted to each other at their bases, whereby said 40 for pivotal movement as by means of rivets Ill, Support members may be angularly displaced th eenforcjng ring C, whereby such reenf r i about a vertical axis with respect to one another, ring may be angularly displaced about a horizona o cing ring mo on one of Said pt l i b t r 1 port members for angular displacement about a Th upper free extremities of arms 8 of upport horizontal axis, and interlocking elements formed 45 bar B are bent inwardly to form channels ll integrally With Said Teenforoihg Ting a d the bounded by side walls l2 and end walls It and I4; other of said pp rt me r adapted to coand associated therewith are channel formations operate for latching the Same When the ring 8 15 on diametrically opposite portions of the ring displaced to the horizontal p C, b d d by id ll [5 and end Walls "and 2. A collapsible, hoisting frame comprising a is, the channel formations is of the ring (3 being li y o support members capable f ne ine slightly longer than the Width of the arms 8 of e in the other, a pivot mounting in the bases of support bar B, and the channel formations ll of e s pp r m m whe y h m y e arms 8 beingv slightly longer than the width of gularly di p d about t Vertical aXiS w ring 0, so that, as shown in Figures 1 and 3, the respect to one a t a reenforeing ring pivot- 55 ally mounted to one of said support members for angular displacement about the horizontal axis and channel formations on the ring, and the other of said support members, for causing interlocking of said other support member and ring when the latter is in the horizontal plane.

3. A collapsible hoisting frame comprising a plurality of U-shaped body members of different width and the same structural formation, whereby said support members may be nested, a pivot member passing centrally of the bases of said support members to permit angular displacement thereof with respect to a vertical axis, a reenforcing ring pivotally mounted at diametrically opposite portions to the arms of the narrower of said support members adapted to nest within said narrower support member, said reenforcing ring being capable of angular displacement about a horizontal axis, said reenforcing ring and the wider of said support members having integral interlocking elements for latching the same when the reenforcing ring is displaced to a horizontal plane.

4. A collapsible hoisting frame comprising a plurality of support members capable of nesting one onto the other, said support members being pivoted to each other at their bases, whereby said support members may be angularly displaced about a vertical axis with respect to one another, a reenforcing ring mounted on one of said support members for angular movement about a horizontal axis, the other of said support members being resilient and displaceable at its free ends upon contact with the reenforcing ring, and interlocking elements on said reenforcing ring and said last named support member for latching the same when the reenforcing ring is displaced to the horizontal plane and into pressure contact with said last named support member.

DAVID LEVOW. 

